Figure 1.

TEM image and photophysical properties of MS-GNRs. (a) TEM image of MS-GNRs, with insert showing an enlarged view of its mesoporous structure. (b) Photoluminescence spectrum of MS-GNRs in an aqueous solution irradiated with femtosecond laser at 800 nm. (c) Dependence of the integrated photoluminescence intensity of (b), versus the excitation power; slope, obtained from the regression fitting, is ~2 indicating that the measured photoluminescence is indeed TPL. (d) Steady-state absorption of MS-GNRs (solid line) and the TPL excitation spectrum (open triangles).